Overview

The while tag works with a variable with multiple values.

Setting a variable

To set a variable with multiple values, use the set-multi tag.

 <set-multi var="n" value="v"/>

Getting a variable

To get the value of a variable, use the value-of tag.

 <value-of expr="?@n?"/>

Looping

To use a variable with multiple values, use the while tag.

 <while using-items-in="n"/>

Colors

In the following example, a variable called color is list of colors. A list of colors is emitted.

 <set-multi var="color" value="red,yellow,pink,green"/>
 <while using-items-in="color">
   <value-of expr="?@color?"/>
 </while>

Output:

 red
 yellow
 pink
 green

Coordinates

In the following example, x,y,z is a coordinate.

 <set-multi var="x" value="1,2,3"/>
 <set-multi var="y" value="4,5,6"/>
 <set-multi var="z" value="7,8,9"/>
 <while using-items-in="x,y,z">
   <value-of expr="?@x?,?@y?,?@z?"/>
 </while>

Output:

 1,4,7
 2,5,8
 3,6,9

Matrix

In the following example, row-column is a matrix.

 <set-multi var="row" value="a,b"/>
 <set-multi var="column" value="1,2,3"/>
 <while using-items-in="row">
   <while using-items-in="column">
     <value-of expr="?@row?-?@column?"/>
   </while>
 </while>

Output:

 a-1
 a-2
 a-3
 b-1
 b-2
 b-3

Contents

This document contains the following sections.

• Section A - Notes

Section A - Notes

Introduction

This section contains notes on the use of the while construct.

Notes

One part of the source code contains a repeating pattern.

1. How do I use a while construct?

Sample

 <set-multi var="n" value="1,2,3"/>
 <while using-items-in="n">
 </while>